The quake breakers were a pair of chainsaw-like weapons that served as Onua Nuva's Toa tools before he acquired his adaptive armor.1, 2, 3, 4, 5, 6, 7, 8, 9, 10 Onua used them to channel and focus his elemental power of earth.CN The quake breakers could easily cut through earth and rock, allowing Onua to tunnel underground.1, 2, 3, 4, 7, 6, 8, 11 They could cut through even the hardest rock.5 They could also withstand searing hot temperatures.12 The quake breakers could also be attached to Onua's feet to serve as high-speed all-terrain treads1, 2, 4, 3, 5, 8, allowing him to travel quickly over rough ground7, 11 despite the weight of his new Toa Nuva armor11. Onua enjoyed using rolling rocks as moguls, jumping from rock to rock.5 The quake breakers functioned independently of Onua's elemental power; even when he lost his power, Onua was able to activate his quake breakers and bore holes into tunnel walls.12
Onua acquired the quake breakers when he was transformed by energized protodermis into a Toa Nuva. Onua's former clawed hands were transformed by the energized protodermis into the quake breakers.11 Artakha later replaced Onua's armor and quake breakers with adaptive armor and weaponry.13 It is unknown what became of the quake breakers after this; they were apparently left with Artakha.